Relay Not Working

Other Hardware General Electronics
1

I am newer to Arduino, and I tried doing lesson 22, but after wiring everything and uploading the code, nothing happened. I was not getting any error messages, and the serial monitor was showing that it was going through. I thought maybe the relay pins were not making contact, but I soldered them with wires, and still nothing happened. I have followed the wiring diagram on the lesson and double checked it still nothing happening, did I get a defective relay or is there something wrong with the lesson? The entire lesson packet is here. I am looking at lesson 22 specifically.

2

Lesson 22 of what?

3

Clearly, lesson 22 of Arduino. I googled it.

It must be this GPS lesson 22 - http://www.toptechboy.com/arduino/lesson-22-build-an-arduino-gps-tracker/

Or maybe this buzzer lesson 22 - https://www.sunfounder.com/learn/Sensor-Kit-v2-0-for-Arduino/lesson-22-buzzer-sensor-kit-v2-0-for-arduino.html

Or this humiture lesson 22 - https://www.sunfounder.com/learn/sensor_kit_v1_for_Arduino/lesson-22-humiture-sensor-sensor-kit-v1-for-arduino.html

Or this real time clock lesson 22 - https://www.sunfounder.com/learn/rfid-kit-v2-0-for-arduino/lesson-22-real-time-clock-module-rfid-v2-0-for-arduino.html

4

I have edited the post and have the link posted to the packet the lesson is on.

5

Do you have a multimeter? Can you hear the relay "click"?

6

I cannot hear the relay, and I do have a multi-meter

7

you can verify that the relay works, simply by using the multi-meter to check which pins are connected when there is no power on the coil, and then doing the same with power on the coil.

8

I have confirmed that the relay works, and through looking at it more, the relay does not even truly need to be used. But I still could not get the relay to work in that lesson.

9

so now either the lesson is faulty or you made a mistake somewhere.
ehm what makes you think you do not need the relay ? oh and we don't have the code for the lesson